The police officer described Mr. Whyte as being the driver and sole occupant of his vehicle, which was running, with the keys in the ignition. (ngariss.com)
Two people, who were the sole occupants of both vehicles, were taken to Advocate... (articles.chicagotribune.com)
If an autonomous car approaching an obstacle had the option of swerving left and killing a woman and her infant child, or not swerving and killing only you, the sole occupant of the car, which option would you program? (flickfilosopher.com)